amdgpu_pasid_lock(9)

💅 amdgpu_pasid_lock(9) 💅

okay bestie, welcome to the Kernel API Manual ✨ you're literally reading the page for amdgpu_pasid_lock and it's giving "tiny function, big responsibility" energy. let's get into it 🫶

---

🌸 NAME 🌸

amdgpu_pasid_lock — acquire the global PASID xarray lock 💖

like, the global one. the whole xarray. not just your little corner of it. iconic of her tbh 👑

---

✨ SYNOPSIS ✨

void amdgpu_pasid_lock (unsigned long *flags );

no return value, she just does her thing and dips 💅

---

🎀 ARGUMENTS 🎀

• flags — storage for interrupt state 🩷 this is where the saved interrupt state goes when you call her. keep it safe, you'll need it later (spoiler: amdgpu_pasid_unlock wants it back).

---

🦋 DESCRIPTION 🦋

so here's the vibe: amdgpu_pasid_lock acquires the global PASID xarray lock and it does it with interrupts disabled — ngl that's the whole point, no cap 🔥

the saved interrupt state? it's in flags, and you must pass it to amdgpu_pasid_unlock. not optional, not "i'll remember it in my head", just pass it. that's the contract, periodt ✨

⚠️ bestie, do not lose that flags value. the state goes in, the state comes back out. that's the lock/unlock pipeline and it's lowkey sacred 🙏

---

🌈 SEE ALSO 🌈

Kernel file: ./drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c 📁 (the mothership, iykyk)

and the whole friend group 💜:

• amdgpu_pasid_alloc(9)
• amdgpu_pasid_free(9)
• amdgpu_pasid_clear_owner(9)
• amdgpu_pasid_unlock(9)
• amdgpu_pasid_get_fpriv_locked(9)
• amdgpu_pasid_free_delayed(9)
• amdgpu_vmid_had_gpu_reset(9)
• amdgpu_vmid_grab_idle(9)
• amdgpu_vmid_grab_reserved(9)
• amdgpu_vmid_grab_used(9)
• amdgpu_vmid_grab(9)
• amdgpu_vmid_reset(9)
• amdgpu_vmid_reset_all(9)
• amdgpu_vmid_mgr_init(9)
• amdgpu_vmid_mgr_fini(9)
• amdgpu_pasid_mgr_cleanup(9)

---

and that's the whole page, bestie 🧚💖 slay responsibly, lock your xarrays, and always hand your flags to amdgpu_pasid_unlock — mwah 💋

sign-off szn: this little masterpiece lives in ./drivers/gpu/drm/amd/amdgpu and it's dated October 2026 — yes, from the future, we stay ahead of schedule ⭐👑